OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4 Flash 0731 vs Kimi K2.8 Preview

DeepSeek V4 Flash 0731 has the lower published input-plus-output rate, more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size. Compare price, speed, context, and privacy.

Verify gateway

Onebase URL to migrate

100sof models and routes

0prompt or output logs. Always.

Compare routesProviders, price, context, and policy posture in one view.

Use auto when uptime mattersKeep a primary model and let fallback handle provider failures.

Same API shapeUse the OpenAI client and set the model you want.

Practical read

Monthly evidence

DeepSeek V4 Flash 0731 has the lower published input-plus-output rate, more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size.

$0.142425/1MDeepSeek: DeepSeek V4 Flash 0731 cheapest route

$5.275/1MKimi K2.8 Preview cheapest route

819 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via mancer

2714 msKimi K2.8 Preview fastest measured p50 TTFT via tencent

The price comparison adds each route's rate for one million input tokens and one million output tokens; your cost depends on your input/output mix. Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

DeepSeek: DeepSeek V4 Flash 0731Kimi K2.8 Preview

Model iddeepseek/deepseek-v4-flash-0731moonshotai/kimi-k2.8-preview

Publisher DeepSeek Kimi

AI IQ — —

Context1,048,576 tokens1,048,576 tokens

Credits provider routes271

Cheapest route$0.142425/1M$5.275/1M

Cached input$0.01/1M to $0.118793/1M$0.26375/1M

Privacy posturehas Confidential route (E2EE + ZDR)provider posture varies

Fastest measured p50 TTFT819 ms via mancer2714 ms via tencent

Highest measured throughput166 tok/s via confidential-ainot enough data

Recent route uptime range91.67% to 100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview27 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Kimi K2.8 Preview routes

Overview1 Credits routes

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DeepSeek: DeepSeek V4 Flash 0731 vs Qwen: Qwen3.8 27B45 combined provider routes
DeepSeek: DeepSeek V4 Flash 0731 vs Google: Gemma 4 31B44 combined provider routes

Production choice

Pick a default model. Keep fallback enabled.

TrustedRouter is useful when you know the model you want, but still need provider rollover, budget limits, usage records, and a prompt path you can verify.

OpenAI clientPython

client = OpenAI(
    base_url="https://api.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="deepseek/deepseek-v4-flash-0731",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0731 or Kimi K2.8 Preview?

DeepSeek V4 Flash 0731 has the lower published input-plus-output rate, more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size.

Is DeepSeek: DeepSeek V4 Flash 0731 or Kimi K2.8 Preview cheaper?

The current cheapest TrustedRouter route is $0.142425/1M for DeepSeek: DeepSeek V4 Flash 0731 and $5.275/1M for Kimi K2.8 Preview. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0731 or Kimi K2.8 Preview faster?

Current measured p50 time to first token is 819 ms for DeepSeek: DeepSeek V4 Flash 0731 and 2714 ms for Kimi K2.8 Preview. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4 Flash 0731 and Kimi K2.8 Preview with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between deepseek/deepseek-v4-flash-0731 and moonshotai/kimi-k2.8-preview. This makes side-by-side evals possible without maintaining two provider integrations.